Right now there don't seem to be great options. I try to figure it out on occasion but it can be a chore to be on too many websites or apps. Married men have jobs, wives, kids, etc. lots of obligations so we're typically busy doing things to support a family. It feels like a lot of CS don't understand this and approach us online with a lot of the typical game playing they do in gay dating that doesn't apply in our world.
My experience has been a lot of guys that can't host, can't send a picture, and want something to happen instantly. There are a lot of expectations to make out, mutual reciprocation, or too much of their personal and specific fantasy. That's what my wife is for, if I have a buddy for this sort of thing then I'm expecting him to be focused on my pleasure and what he can do for me. Otherwise they're just looking for a gay relationship, so why would you want to be with a guy with a wedding band on his finger?